Unknown PD distinction in HVAC/HVDC by antenna-sensor with pulse sequence analysis
Document Type
Article
Publication Date
3-1-2024
Abstract
Ultra-high frequency (UHF) antenna-sensors are becoming popular for non-invasive detection of unwanted electric discharge i.e., partial discharge (PD) in high-voltage (HV) systems. Early PD signals are weak for detection and classification by UHF antenna-sensors. Early PD detection and distinction are crucial to prevent equipment failure. Typically, PD signals are distinguished in HVAC by phase resolved PD (PRPD) patterns. Whereas in HVDC, some unconventional methods are applied. However, a blind distinction of PDs under unknown HVAC/HVDC conditions still remains a challenge. In this article, we address this issue by using a lotusshaped UHF antenna-sensor for early PD detection. Unlike cut-and-try technique-based conventionally designed bio-inspired antennas, our sensor is designed by a precisely derived equivalent circuit model to systematically optimize antenna gain over size to detect early PDs. The fabricated sensor has a size of 18x11 cm2, an average realized gain of 3.05 dBi in 740-1600 MHz frequencies, and a sensitivity index of 154.04 dBi/m2. The sensor prototype is applied to wirelessly distinguish PD signals from unknown sources under HVAC and HVDC by pulse sequence analysis. Early detection, characterization, and distinction of unknown PD signals are ensured by the proposed sensor and interpretation technique. This work offers a distinctive PD sensing method for HVAC/HVDC converter stations.
Keywords
Partial discharge, Antenna, UHF sensor, PD detection, PD distinction, PD classification, HVAC/HVDC
Divisions
sch_ecs
Funders
Universiti Malaya (UM) , Malaysia (IMG003-2023),RU Geran-Fakulti Program (GPF008A-2023),Malaysian Ministry of Higher Education
Publication Title
Alexandria Engineering Journal
Volume
91
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS